/Engine/Source/Developer/SlateReflector/Public/ISlateReflectorModule.h
Registers a tab spawner for the widget reflector.
void RegisterTabSpawner ( const [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [FWorkspaceItem](API\Runtime\Slate\Framework\Docking\FWorkspaceItem) > & WorkspaceGroup )